If
I tried to read, much less answer all the criticisms made of me and all the attacks
leveled against me, this office would have to be closed for all other business  I do
the best I know how, the very best I can  I mean to keep on doing this, down to the
very end.

 President
Abraham Lincoln

I
have benefited enormously from criticism, and at no point did I suffer from any
perceptible lack thereof.

 Sir Winston
S. Churchill

It
is not the critic who counts, not the man who points out how the strong man stumbled, or
where the doer of deeds could have done them better. The credit belongs to the man who is
actually in the arena, whose face is marred by dust and sweat and blood; who strives
valiantly; who errs and comes short again and again; who knows the great enthusiasms, the
great devotions, and spends himself in a worthy cause; who, at the best, knows in the end
the triumph of high achievement; and who, at the worst, if he fails, at least fails while
daring greatly, so that his place shall never be with those cold and timid souls who know
neither victory nor defeat.